Roll gyp dependency to 1564.

This is to fix the standalone gyp build. It couldn't handle changes made in r1721. This is the latest version.
Review URL: https://codereview.appspot.com/7204049

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1792 736b8ea6-26fd-11df-bfd4-992fa37f6226

DEPS

@@ -1,6 +1,6 @@
 deps = {
   "trunk/third_party/gyp":
-      "http://gyp.googlecode.com/svn/trunk@1080",
+      "http://gyp.googlecode.com/svn/trunk@1564",
 
   "trunk/third_party/googletest":
       "http://googletest.googlecode.com/svn/trunk@573", #release 1.6.0

build/common.gypi

@@ -69,7 +69,7 @@
             ],
             'RuntimeTypeInfo': 'false',
             'WarningLevel': '4',
-            'DisableSpecificWarnings': '4100;4127;4189;4239;4244;4245;4512;4702',
+            'DisableSpecificWarnings': [4100, 4127, 4189, 4239, 4244, 4245, 4512, 4702],
           },
           'VCLinkerTool': {
             'FixedBaseAddress': '1',